CN109814525A - A kind of automated testing method detecting automobile ECU CAN bus communication voltage range - Google Patents
A kind of automated testing method detecting automobile ECU CAN bus communication voltage range Download PDFInfo
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Abstract
The present invention relates to CAN communication automatic test fields, specifically disclose a kind of automated testing method for detecting automobile ECU CAN bus communication voltage range, including computer, CAN testing cassete, programmable power supply and equipment under test, the computer is separately connected CAN testing cassete and programmable power supply, and the CAN testing cassete and programmable power supply are separately connected equipment under test；It the described method comprises the following steps: being S1, starting voltage by the output voltage setting of programmable power supply, opening programmable power supply is powered on to equipment under test；S2, starting voltage is tested in such a way that first is progressive by setting step-length threshold value, and test time is T every time；S3, it continues to monitor whether equipment under test stops sending CAN message, is to enter step S4, otherwise return step S2；S4, the first supply voltage value for reading equipment under test at this time, and the first measured value is output to computer and is shown, the present invention can replace manual mode of operation to execute test automatically and generate test report, improve testing efficiency, reduce cost.
Description
Technical field
The present invention relates to CAN communication automatic test field more particularly to a kind of detection automobile ECU CAN bus communication electricity
Press the automated testing method of range.
Background technique
ECU(Electronic Control Unit) electronic control unit, also known as " car running computer ", " vehicle-mounted computer " etc.,
ECU is turned as common computer by microprocessor (CPU), memory (ROM, RAM), input/output interface (I/O), modulus
The large scale integrated circuits such as parallel operation (A/D) and shaping, driving composition, describes that exactly " ECU is exactly vapour with a simple simon says
The brain of vehicle ".
In the prior art, it needs to survey the difference ECU such as car entertainment information system, instrument and air-conditioning on vehicle
Examination, and most of depot is using manual testing's mode, i.e., by being accomplished manually the test to different ECU, this mode is not only
Testing efficiency is low, and production cost is caused to increase, at the same can also due to staff under frazzle caused test result
The problems such as not accurate, on the other hand, since the voltage power supply range of ECU is generally required for 6.5-16V, the ECU of different depots
Optimum voltage be different, cause the limitation of test equipment strong, poor universality, therefore, urgent need are developed one kind and be suitable for
The automation ECU test method of different depots.
Summary of the invention
In view of the above technical problems, the present invention provides one kind, and manual mode of operation can be replaced to execute test and life automatically
At test report, testing efficiency is improved, cost and versatile detection automobile ECU CAN bus communication voltage range are reduced
Automated testing method.
In order to solve the above technical problem, the present invention provides concrete scheme it is as follows: a kind of detection automobile ECU CAN bus
The automated testing method of communication voltage range, including computer, CAN testing cassete, programmable power supply and equipment under test, the computer point
Not Lian Jie CAN testing cassete and programmable power supply, the CAN testing cassete and programmable power supply are separately connected equipment under test；The method packet
Include following steps:
It S1, is starting voltage by the output voltage setting of programmable power supply, opening programmable power supply is powered on to equipment under test；
S2, starting voltage is tested in such a way that first is progressive by setting step-length threshold value, and test time is T every time；
S3, it continues to monitor whether equipment under test stops sending CAN message, is to enter step S4, otherwise return step S2；
S4, the first supply voltage value for reading equipment under test at this time, and the first measured value is output to computer and is shown.
Preferably, the method also includes following steps:
S5, judge whether the first measured value is equal to the first desired value, be, enter step S6, otherwise export test crash result simultaneously
Stop test；
S6, the first supply voltage value read in step S4 is tested in such a way that second is progressive by setting step-length threshold value, and
Each test time is T, and the first progressive mode and the second progressive mode are inverse relationship；
S7, it continues to monitor whether equipment under test restores to send CAN message, is to enter step S8, otherwise return step S6；
S8, the second source voltage value for reading equipment under test at this time, and the second measured value is output to computer and is shown.
Preferably, the method also includes following steps:
S9, judge whether the second measured value is equal to the second desired value, be, export test by as a result, otherwise exporting test crash
As a result.
Preferably, the described first progressive mode is that gradually decreasing fashion, the second progressive mode are gradually incremental manner,
It is capable of detecting when that equipment under test stops sending the first measured value of CAN message and restores to send the second measured value of CAN message.
Preferably, the described first progressive mode is that gradually incremental manner, the second progressive mode are gradually decreasing fashion,
It is capable of detecting when that equipment under test stops sending the first measured value of CAN message and restores to send the second measured value of CAN message.
Preferably, the step-length threshold value that sets both will not lead to detection not because setting step-length threshold value is excessive as 0.1V
Precisely, while it will not cause testing procedure excessively to the extended testing system time because setting step-length threshold value is too small.
Preferably, the test time T is 30s, keeps certain test time, it can be ensured that test result
Precision.
Preferably, further comprising the steps of before the step S1:
S0, according to different ECU CAN bus communication voltage range Demand Design test cases, and input expected result, it is described
Expected result includes the first desired value and the second desired value.
Preferably, after the completion of the test, test report document is automatically generated, improves automatic test degree, is reduced
Artificial degree of dependence.
Compared with prior art, the beneficial effects of the present invention are: 1, the present invention can replace manual mode of operation automatic
It executes and tests and generate test report, improve testing efficiency, reduce cost；
2, the present invention can satisfy the test of the difference such as car entertainment information system, instrument and air-conditioning of different depots ECU, general
Property is strong.
Detailed description of the invention
Fig. 1 is the main program flow chart of one embodiment of the invention；
Fig. 2 is the test method flow chart of one embodiment of the invention；
Fig. 3 is the test method flow chart of another embodiment of the present invention；
Fig. 4 is the software interface schematic diagram that one embodiment of the invention uses；
Fig. 5 is the test report document schematic diagram of one embodiment of the invention；
Fig. 6 is hardware connection diagram of the invention.
Specific embodiment
For the technical solution that the present invention will be described in detail, below in conjunction with the attached drawing of the embodiment of the present invention, to of the invention real
The technical solution for applying example carries out clear, complete description.Obviously, described embodiment is a part of the embodiments of the present invention,
Instead of all the embodiments.Based on described the embodiment of the present invention, those of ordinary skill in the art are without creativeness
Every other embodiment obtained, shall fall within the protection scope of the present invention under the premise of labour.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff it is identical.Term used herein is intended merely to description specific embodiment
Purpose, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more relevant listed items
Any and all combinations.
For example, a kind of automated testing method for detecting automobile ECU CAN bus communication voltage range, including computer, CAN
Testing cassete, programmable power supply and equipment under test, the computer are separately connected CAN testing cassete and programmable power supply, the CAN testing cassete and
Programmable power supply is separately connected equipment under test；It the described method comprises the following steps: S1, being by the output voltage setting of programmable power supply
Beginning voltage is opened programmable power supply, is powered on to equipment under test；S2, starting voltage is pressed to setting step-length threshold value in such a way that first is progressive
It is tested, and test time is T every time；S3, continue to monitor equipment under test whether stop send CAN message, be then into
Enter step S4, otherwise return step S2；S4, the first supply voltage value for reading equipment under test at this time, and the first measured value is defeated
Computer is arrived out to show.
In the present embodiment, manual mode of operation can be replaced to execute automatically and test and generate test report, improve test
Efficiency reduces cost, and the test of the difference such as car entertainment information system, instrument and air-conditioning for meeting different depots ECU, leads to
It is strong with property.
In one embodiment, as shown in fig. 6, provide it is a kind of detection automobile ECU CAN bus communication voltage range from
Dynamicization test method, including computer, CAN testing cassete, programmable power supply and equipment under test, the computer are separately connected CAN testing cassete
And programmable power supply, the CAN testing cassete and programmable power supply are separately connected equipment under test；As shown in Figure 1, Figure 2 and Figure 4, the side
Method the following steps are included:
It S1, is starting voltage by the output voltage setting of programmable power supply, opening programmable power supply is powered on to equipment under test；
S2, starting voltage is tested in such a way that first is progressive by setting step-length threshold value, and test time is T every time；
S3, it continues to monitor whether equipment under test stops sending CAN message, is to enter step S4, otherwise return step S2；
S4, the first supply voltage value for reading equipment under test at this time, and the first measured value is output to computer and is shown.
Specifically, Vector CANoe programming software should be installed first on the computer used, pass through Vector CANoe
Programming software writes process control programmable power supply and CAN testing cassete, and Can testing cassete sends message and connect for emulating other ECU
The message that equipment under test is sent, the CAN message in monitoring and parsing network are received, programmable power supply is used to power to equipment under test.
In step sl, the output voltage that programmable power supply is arranged is 14.4V, is by the output voltage setting of programmable power supply
Beginning voltage is opened programmable power supply, is powered on to equipment under test.
In step s 2, starting voltage is tested in such a way that first is progressive by setting step-length threshold value, and test every time
Duration is T, specifically, described sets step-length threshold value as 0.1V, will not both be caused because setting step-length threshold value is excessive
It detects not accurate, while testing procedure will not be caused excessively to the extended testing system time because setting step-length threshold value is too small,
Wherein, the test time T be 30s, keep certain test time, it can be ensured that test result it is accurate
Degree, the time span of 30s just, both will not because of the testing time it is too long cause reduce testing efficiency, will not because of test when
Between it is too short and cause the precision of test result poor, the progressive mode of first referred in the step is gradually decreasing fashion, in conjunction with
Starting voltage noted earlier is 14.4V, sets step-length threshold value as 0.1V, test time 30s, in the base of 14.4V
It on plinth, is tested in a manner of the 0.1V that successively decreases every time, and test time is 30s every time.
In step s3, it continues to monitor whether equipment under test stops sending CAN message, is to enter step S4, otherwise returns
Step S2 is returned, during the supply voltage of equipment under test gradually successively decreases, the CAN bus message of lasting monitoring equipment under test
Transmission state, when equipment under test stop send CAN message when, then enter step S4, when equipment under test continuing send CAN report
Continue to test after Wen Shi, then return step S2, the 0.1V that successively decreases on the basis of the supply voltage, and test time is 30s.
In step s 4, the first supply voltage value of equipment under test at this time is read, and the first measured value is output to computer
It has been shown that, the first supply voltage value at this time are that equipment under test stops the critical state that CAN bus message is sent, and first is surveyed
Magnitude is output to computer and shows, in order to staff's checking and counting to test result.
In one embodiment, as shown in Fig. 2, the described method comprises the following steps:
It S1, is starting voltage by the output voltage setting of programmable power supply, opening programmable power supply is powered on to equipment under test；
S2, starting voltage is tested in such a way that first is progressive by setting step-length threshold value, and test time is T every time；
S3, it continues to monitor whether equipment under test stops sending CAN message, is to enter step S4, otherwise return step S2；
S4, the first supply voltage value for reading equipment under test at this time, and the first measured value is output to computer and is shown；
S5, judge whether the first measured value is equal to the first desired value, be, enter step S6, otherwise export test crash result simultaneously
Stop test；
S6, the first supply voltage value read in step S4 is tested in such a way that second is progressive by setting step-length threshold value, and
Each test time is T, and the first progressive mode and the second progressive mode are inverse relationship；
S7, it continues to monitor whether equipment under test restores to send CAN message, is to enter step S8, otherwise return step S6；
S8, the second source voltage value for reading equipment under test at this time, and the second measured value is output to computer and is shown.
Specifically, in step s 5, judging whether the first measured value is equal to the first desired value, it is, enters step S6, it is no
It then exports test crash result and stops testing, when the first measured value is equal to the first desired value, that is, illustrate the survey of equipment under test
Test result meets the test of first stage, enters in step S6, if the first measured value and the first desired value have deviation, illustrates quilt
The test result of measurement equipment fails, then exports test crash result and stop testing.
In step s 6, by the first supply voltage value read in step S4 by setting step-length threshold value in such a way that second is progressive
It is tested, and test time is T every time, the first progressive mode and the second progressive mode are inverse relationship, this reality
It applies in example, the progressive mode of first in step s 2 is gradually decreasing fashion, i.e., on the basis of the initial voltage 14.4V of setting
On, it is tested in a manner of the 0.1V that successively decreases every time, and test time is 30s every time, the second progressive mode is passed with first
It is inverse relationship into mode, i.e., on the basis of the first supply voltage value, is tested in a manner of being incremented by 0.1V every time, and every
Secondary test time is 30s.
In the step s 7, it continues to monitor whether equipment under test restores to send CAN message, is to enter step S8, otherwise returns
Step S6 is returned, during the supply voltage of equipment under test is gradually incremented by, the CAN bus message of lasting monitoring equipment under test
Transmission state, when equipment under test restore send CAN message when, then enter step S8, when equipment under test continuing send CAN report
Wen Shi, then return step S6, continues to test after being incremented by 0.1V on the basis of the supply voltage, and test time is 30s.
In step s 8, the second source voltage value of equipment under test at this time is read, and the second measured value is output to computer
It has been shown that, second source voltage value at this time are that equipment under test restores the critical state that CAN bus message is sent, and second is surveyed
Magnitude is output to computer and shows, in order to staff's checking and counting to test result.
In one embodiment, the method also includes following steps: S9, judging whether the second measured value is equal to the second phase
Prestige value is to export test to pass through as a result, otherwise exporting test crash result.
In one embodiment, as shown in figure 3, the method the following steps are included:
S0, according to different ECU CAN bus communication voltage range Demand Design test cases, and input expected result, it is described
Expected result includes the first desired value and the second desired value；
It S1, is starting voltage by the output voltage setting of programmable power supply, opening programmable power supply is powered on to equipment under test；
S2, starting voltage is tested in such a way that first is progressive by setting step-length threshold value, and test time is T every time；
S3, it continues to monitor whether equipment under test stops sending CAN message, is to enter step S4, otherwise return step S2；
S4, the first supply voltage value for reading equipment under test at this time, and the first measured value is output to computer and is shown；
S5, judge whether the first measured value is equal to the first desired value, be, enter step S6, otherwise export test crash result simultaneously
Stop test；
S6, the first supply voltage value read in step S4 is tested in such a way that second is progressive by setting step-length threshold value, and
Each test time is T, and the first progressive mode and the second progressive mode are inverse relationship；
S7, it continues to monitor whether equipment under test restores to send CAN message, is to enter step S8, otherwise return step S6；
S8, the second source voltage value for reading equipment under test at this time, and the second measured value is output to computer and is shown；
In the present embodiment, in step S0, according to different ECU CAN bus communication voltage range Demand Design test cases,
And expected result is inputted, the expected result includes that the first desired value and the second desired value are first completed before official testing starts
To the ECU CAN bus communication voltage range Demand Design test case of different depots or disparity items, and input expectation knot
Fruit show whether the test result of equipment under test meets the requirements, while being also convenient in order to be compared with actual measured value
When replacing the ECU test of different depots, it need to only operate and switch in computer end.
In the step S2 of the present embodiment, the progressive mode of described first is gradually incremental manner, and described second is passed
It is gradually decreasing fashion into mode, tests the stopping for obtaining equipment under test respectively using gradually incremental manner and gradually decreasing fashion
The first supply voltage value, the first measured value, second source voltage value and the second measured value of message are sent, and is surveyed respectively by first
Magnitude is compared with the first desired value, and the second measured value and the second desired value are compared, obtain test result.
In one embodiment, as shown in figure 5, after the completion of the test, test report document is automatically generated, is improved certainly
Dynamicization test degree, reduces artificial degree of dependence.
Test report document may include that the hardware of test macro is executed and is not carried out with software version information, test case
Number, the failure number of test case and pass through number, the detailed execution step of test case and test result information, this implementation
In measuring executing process, real-time update shows the executive condition of current test case and is executing a test every time example
After use-case, correlation measure and test result are output to software interface, convenient for the understanding at any time of staff.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Therefore it cannot understand limitations on the scope of the patent of the present invention.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range, therefore, protection scope of the present invention should be determined by the appended claims.
Claims (9)
1. a kind of automated testing method for detecting automobile ECU CAN bus communication voltage range, which is characterized in that including electricity
Brain, CAN testing cassete, programmable power supply and equipment under test, the computer are separately connected CAN testing cassete and programmable power supply, and the CAN is surveyed
Examination box and programmable power supply are separately connected equipment under test；It the described method comprises the following steps:
It S1, is starting voltage by the output voltage setting of programmable power supply, opening programmable power supply is powered on to equipment under test；
S2, starting voltage is tested in such a way that first is progressive by setting step-length threshold value, and test time is T every time；
S3, it continues to monitor whether equipment under test stops sending CAN message, is to enter step S4, otherwise return step S2；
S4, the first supply voltage value for reading equipment under test at this time, and the first measured value is output to computer and is shown.
2. the automated testing method of detection automobile ECU CAN bus communication voltage range according to claim 1, special
Sign is that the method also includes following steps:
S5, judge whether the first measured value is equal to the first desired value, be, enter step S6, otherwise export test crash result simultaneously
Stop test；
S6, the first supply voltage value read in step S4 is tested in such a way that second is progressive by setting step-length threshold value, and
Each test time is T, and the first progressive mode and the second progressive mode are inverse relationship；
S7, it continues to monitor whether equipment under test restores to send CAN message, is to enter step S8, otherwise return step S6；
S8, the second source voltage value for reading equipment under test at this time, and the second measured value is output to computer and is shown.
3. the automated testing method of detection automobile ECU CAN bus communication voltage range according to claim 2, special
Sign is that the method also includes following steps:
S9, judge whether the second measured value is equal to the second desired value, be, export test by as a result, otherwise exporting test crash
As a result.
4. the automated testing method of detection automobile ECU CAN bus communication voltage range according to claim 2, special
Sign is: the first progressive mode is that gradually decreasing fashion, the second progressive mode are gradually incremental manner.
5. the automated testing method of detection automobile ECU CAN bus communication voltage range according to claim 2, special
Sign is: the first progressive mode is that gradually incremental manner, the second progressive mode are gradually decreasing fashion.
6. the automated testing method of detection automobile ECU CAN bus communication voltage range according to claim 1, special
Sign is: the step-length threshold value that sets is 0.1V.
7. the automated testing method of detection automobile ECU CAN bus communication voltage range according to claim 2, special
Sign is: the test time T is 30s.
8. the automated testing method of detection automobile ECU CAN bus communication voltage range according to claim 3, special
Sign is, further comprising the steps of before the step S1:
S0, according to different ECU CAN bus communication voltage range Demand Design test cases, and input expected result, it is described
Expected result includes the first desired value and the second desired value.
9. the automated testing method of detection automobile ECU CAN bus communication voltage range according to claim 8, special
Sign is: after the completion of the test, automatically generating test report document.
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| CN109814525B (en) | 2022-03-22 |
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